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six 1.17.0: Require instantiated exception instances rather than string messages in six.reraise, and suppress context chaining when from_value is None in six.raise_from

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実行証拠

宣言された環境と署名済みの実行を分けてあります。このサンプルが何をどこで実行したかをそのまま確認できます。

宣言された環境 python linux x64 python python pip

環境	コントラクト	ステージ	実行日
python 3.12 · linux alpine/x64 · docker ed25519:d91480838ac982c9	PASS	compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · python@1	2026-08-17
python 3.12 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1	PASS	compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · python@1	2026-08-18

HOW

ゴール: Require instantiated exception instances rather than string messages in six.reraise, and suppress context chaining when from_value is None in six.raise_from
パッケージ: six 1.17.0
シンボル: six.reraise
six.raise_from
環境: python
作成日: 2026-08-17T06:56:32Z

six.reraise requires value to be an exception instance or None and raises AttributeError when passed a string message, unlike Python 2 raise syntax
six.reraise with value=None instantiates tp with zero arguments and preserves the provided traceback
six.reraise raises the provided value instance directly even when tp does not match value's type
six.raise_from with from_value=None sets __cause__ to None and enables __suppress_context__
six.raise_from with an exception instance sets __cause__ to the specified cause exception
six.raise_from instantiates uninstantiated exception classes passed as exc before attaching cause